The goal of this book is to provide a concise but lucid explanation and deriva- tion of the fundamentals of spread-spectrum communication systems. Although spread-spectrum communication is a staple topic in textbooks on digital com- munication, its treatment is usually cursory, and the subject warrants a more intensive exposition. Originally adopted in military networks as a means of ensuring secure communication when confronted with the threats of jamming and interception, spread-spectrum systems are now the core of commercial ap- plications such as mobile cellular and satellite communication.
標(biāo)簽： Principles Spectrum Spread of
上傳時(shí)間： 2020-05-31
上傳用戶：shancjb
The goal of this book is to provide a concise but lucid explanation and deriva- tion of the fundamentals of spread-spectrum communication systems. Although spread-spectrum communication is a staple topic in textbooks on digital com- munication, its treatment is usually cursory, and the subject warrants a more intensive exposition. Originally adopted in military networks as a means of ensuring secure communication when confronted with the threats of jamming and interception, spread-spectrum systems are now the core of commercial ap- plications such as mobile cellular and satellite communication.
標(biāo)簽： Spread-Spectrum Communication Systems 1st
上傳時(shí)間： 2020-06-01
上傳用戶：shancjb
The first practical examples of mobile communications were used in many countries like the USA, the UK and Germany in military services, and played a significant role in the First World War to transfer important information from the front to headquarters to take further actions. Good and secure wireless communications were an important need for all military services – army, navy and air force. In this respect, the Second World War was a big experimental battlefield for the development and evolution of mobile radio. It was in the interests of governments that after the Second World War the military investment should be paid back by civilian use, and all western European countries started their so-called first generation of mobile communication networks.
標(biāo)簽： Multimedia Business Mobile The
上傳時(shí)間： 2020-06-01
上傳用戶：shancjb
The term “ smart grid ” defi nes a self - healing network equipped with dynamic optimiza- tion techniques that use real - time measurements to minimize network losses, maintain voltage levels, increase reliability, and improve asset management. The operational data collected by the smart grid and its sub - systems will allow system operators to rapidly identify the best strategy to secure against attacks, vulnerability, and so on, caused by various contingencies. However, the smart grid fi rst depends upon identifying and researching key performance measures, designing and testing appropriate tools, and developing the proper education curriculum to equip current and future personnel with the knowledge and skills for deployment of this highly advanced system.
上傳時(shí)間： 2020-06-07
上傳用戶：shancjb
The electrical power grid is often referred to as one of the most complex man- made systems on Earth. Its importance to all aspects of our daily lives, economic stability, and national security cannot be overstated, and the need for an updated, secure, resilient, and smarter power grid infrastructure is increasingly recognized and supported by policy makers and market forces.
上傳時(shí)間： 2020-06-07
上傳用戶：shancjb
Sensors are points ofcontact betweenthe material world ofatoms, mass, andenergy and the seemingly immaterial world of information, computation, and cognition. Linking these two domains more tightly yields all sorts of practical benefits, such as improvedinputdevicesforcomputers,moreeffectivemedicaldevices(implantedor worn), more precise agricultural operations, better monitored buildings or bridges, more secure payment systems, and more reliable sensor–actuator control systems. There are many settings in which tighter coupling between digital and physical planes can enhance safety, security, performance, and reliability.
標(biāo)簽： Computational RFID
上傳時(shí)間： 2020-06-08
上傳用戶：shancjb
If the space around us could adapt to our needs and intentions, then our lives would be much simpler. We would have to spend less time on our daily chores, we would be more productive and, hopefully, we would live in a less worrisome and, most likely, more secure world
標(biāo)簽： Ambient_Intelligence a_novel_paradigm
上傳時(shí)間： 2020-06-10
上傳用戶：shancjb
全網(wǎng)最全的autojs列子，有一千六百多的腳本文件,腳本內(nèi)容包含：幾十種類型的UI腳本，抖音、QQ、微信、陌陌、支付寶等自動(dòng)化操作的腳本、還有部分協(xié)議列表，HTTP協(xié)議(POST、GET)上傳下載，接碼模塊，百度文字識(shí)別api模塊，文件操作模塊：txt文本讀一行刪一行，等等其他例子QQ語音紅包.jsqq語音紅包，沒加懸浮窗，我覺得自己用腳本引擎會(huì)好點(diǎn).jsQQ語音輸入(Tim版)(1).jsQQ語音輸入(Tim版).jsQQ資料贊.jsqq轟炸機(jī)(1).jsqq轟炸機(jī).jsQQ選圖涂鴉.jsqq順序點(diǎn)贊腳本.jsQQ，微信聊天輔助腳本(文本分割填充字符) v2.jsQQ，微信聊天輔助腳本(文本分割填充字符).jsqtiao.jsrawWindow求解.jsrelationship.jsrhinoneteasecloudmusic.jsRobot.jsROOT權(quán)限啟動(dòng)無障礙服務(wù).jsRSA.jsscript.jsscroll的使用.jsSecure.jssetting.jssha256.jsshell開關(guān)飛行模式.jsshuabaoviod.jsSMSCODE.jsSmsCodeExtract.jssojson.com.jssoul_靈魂匹配.jsspinner例子.jsSqlDatabase2.jsss.jsstart(2).jssun_rise&set.jssurfaceView(簡單示例).jsSwitch控件.jstcp連接客戶端.jste.jstest(1).jstest(2).jstest(3).jstest(4).jstest.jstestTouch.jstestyinhe.jsTheWolf_API.jstoast圖片加文字.jstoast替代函數(shù).jstranslate.jsTrun(翻翻樂).jsts-00-dist.jsTS微信跳一跳滿分(10000)飛速版.jsts跳一跳r9s最新版.jsTS跳一跳全機(jī)型通用版(2).jsts跳一跳全機(jī)型通用版(3).jsts跳一跳全機(jī)型通用版.jsTS跳一跳腳本正確顯示方式（支持root）.jsTS跳一跳自動(dòng).jsTS跳一跳過檢測(cè).jstt.jsTTS(1).jstts.jstts2.jstts3.jsTTS搶語音紅包，作者A酷安(?????)----錦，詳細(xì)使用看代碼注釋.jstxt.jsuc答題.jsui 懸浮窗動(dòng)畫+滑動(dòng)界面.jsUI(2).jsUI.jsuitest - 副本.jsui。.jsui下對(duì)話框文件選擇器(1).jsui中的延時(shí)除了多線程有別的辦法嗎.jsui保存控件屬性3.jsUI全選.jsUI切換.jsui列子.jsui右下角展開按鈕.jsui多界面.jsui屬性(1).jsui開關(guān)控件(1).jsui開關(guān)控件.jsUI文件選擇.jsUI顯示日志.jsUI畫時(shí)鐘作者xxoo.jsui相對(duì)布局.jsUI示例(支付UI).jsui示例app下方tabs.jsui示例下方tabs(1.0.0-1 修復(fù)寬度不適配問題).jsUI腳本使用無障礙的最佳實(shí)踐.jsUI輪播圖.jsui選擇文件.jsUI驗(yàn)證碼（有BUG）.jsuki_0.jsUki消息交互式回復(fù).jsUnlock.jsUntitled-1.jsuntitled.jsUTF.jsvip視頻解析2.1.jsvscode連接不上手機(jī)解決辦法.jsWannaCry(僅為娛樂).jsWeather.jswebScript.jsWebViewClient的使用方法.jswebViewUA切換3.jswebView填充表單加alert.jsWebView多頁面瀏覽(1).jsWebView多頁面瀏覽.jswebView提取圖片地址并加載.jswebView獲取圖片地址.jswebview獲取網(wǎng)頁原圖.jswebview獲取網(wǎng)頁原圖保存.jswebView輸入關(guān)鍵詞搜索.jsweb攔截修改.jsWeChat.jsWechatJumpingAI(2).jsWechatJumpingAI(3).jswechatjumpingai(4).jsWechatJumpingAI.jswife緊急掉線（autojs破解版專用）.js.jswifi設(shè)置代理(未完成).js.js
標(biāo)簽： autojs
上傳時(shí)間： 2021-11-06
上傳用戶：
TFT-LCD(Thin Film Transistor Liquid Crystal Display)即薄膜晶體管液晶顯示器，是微電子技術(shù)與液晶顯示器技術(shù)巧妙結(jié)合的的一種技術(shù)。CRT顯示器的工作原理是通電后燈絲發(fā)熱，陰極被激發(fā)后發(fā)射出電子流，電子流受到高電壓的金屬層的加速，經(jīng)過透鏡聚焦形成極細(xì)的電子束打在熒光屏上，使熒光粉發(fā)光顯示圖像。LCD顯示器需要來自背后的光源，當(dāng)光束通過這層液晶時(shí)，液晶會(huì)呈不規(guī)則扭轉(zhuǎn)形狀（形狀由TFT上的信號(hào)與電壓改變實(shí)現(xiàn)），所以液晶更像是一個(gè)個(gè)閘門，選擇光線穿透與否，這樣就可以在屏幕上看到深淺不一，錯(cuò)落有致的圖像。目前主流的LCD顯示器都是TFT-LCD，是由原有液晶技術(shù)發(fā)展而來。TFT液晶為每個(gè)像素都設(shè)有一個(gè)半導(dǎo)體開關(guān)，以此做到完全的單獨(dú)控制一個(gè)像素點(diǎn)，液晶材料被夾在TFT陣列和彩色濾光片之間，通過改變刺激液晶的電壓值就可以控制最后出現(xiàn)的光線強(qiáng)度和色彩，
上傳時(shí)間： 2022-04-09
上傳用戶：
平板顯示技術(shù) 應(yīng)根裕 胡文波 邱勇 等編著 人民郵電出版社 內(nèi)容提要本書重點(diǎn)介紹電視圖像的平板顯示技術(shù)及其在各個(gè)領(lǐng)域中的應(yīng)用，全書共10意。第1章對(duì)7種已為市場(chǎng)認(rèn)叮的平板顯示技術(shù)作了全方位的比較。第2章介紹了與圖像顯示有關(guān)的人眼生理學(xué)、光度學(xué)、色度學(xué)和電視傳輸?shù)幕驹恚瑸榱吮容^，對(duì)陰極射線管（CRT）顯示技術(shù)也作了一定深度的描述。第3章至第9章分別對(duì)液品顯示（LCD）、等離子體顯示（PDP）、有機(jī)發(fā)光二極管（OLED）顯示、電致發(fā)光顯示（ELD）、場(chǎng)發(fā)射顯示（FED）、真空熒光管顯示（VFD）和發(fā)光二極管（1.ED）顯示的原理、結(jié)構(gòu)工藝、驅(qū)動(dòng)電路和應(yīng)用領(lǐng)域作了全面的介紹，第10章投影顯示是作為大屏幕平板顯示的有力競(jìng)爭者而引人的。本書可作為大專院校物理電子、信息光電子、通信等相關(guān)專業(yè)的大學(xué)生和研究生教材，也可供平板顯示技術(shù)的研發(fā)人員參考，同時(shí)也是平板顯示器件愛好者的良師益友。
標(biāo)簽： 平板顯示
上傳時(shí)間： 2022-04-14
上傳用戶：
蟲蟲下載站版權(quán)所有 京ICP備2021023401號(hào)-1
